# Acute psychological stress does not influence joint position reproduction performance in the elbow joint

## TL;DR

This study found that acute psychological stress does not affect the ability to reproduce elbow joint positions.

## Contribution

The study experimentally tests the effect of stress on proprioceptive accuracy in a controlled setting.

## Key findings

- Psychological stress was successfully induced, as indicated by increased perceived stress.
- Proprioceptive accuracy remained unaffected by the stress manipulation.
- Results suggest that stress does not impair joint position sense in the elbow.

## Abstract

Proprioceptive accuracy is an important aspect of motor functioning thus understanding how the stress response affects it can broaden our knowledge about the effects of stress on motor performance. There has been published only one quasi-experimental study on this topic to date, reporting a negative association between stress and proprioceptive accuracy. The aim of the present study was to explore whether the stress response influences proprioceptive accuracy in a randomized and controlled experimental setting.

Participants (Mage =  20.4 yrs, SDage =  1.91 yrs) were randomly assigned to a stress (n =  29) and a control (n =  28) group. Psychological stress was induced via an online quiz involving time pressure and instant feedback on performance. Participants’ perceived (state anxiety) and physiological (heart rate, heart rate variability, skin conductance level) stress response and proprioceptive accuracy (the active and passive version of the Joint Position Reproduction test for the elbow joint) were measured before and after the experimental manipulation.

The quiz substantially increased only participants’ perceived stress however, proprioceptive accuracy was not impacted by the experimental manipulation.

Perceived stress does not impact proprioceptive accuracy.